What are some technological advances that have led to an increased population

There's numerous factors that contributed to the increase in the human population. The main factor was the advances in the medical field, invention of lot of cures, vaccines, and machines that help improve the human health. The industrialization also was a major factor, as this technological advancement led to change in lifestyle of the people, attracting them in the cities, having safer lives, safer workplaces, not being exposed to the outside factors. The technological advances in the agriculture resulted in much higher food production, so the malnutrition problem was solved. These are some of the major technological advances, though there are many more, all of which managed to improve the life quality and increase the life expectancy, resulting in increase in the population.

the most famous of all the units fighting in cuba, the "rough riders" was the name given to the first u.s. volunteer cavalry under the leadership of theodore roosevelt. roosevelt resigned his position as assistant secretary of the navy in may 1898 to join the volunteer cavalry. the original plan for this unit called for filling it with men from the indian territory, new mexico, arizona, and oklahoma. however, once roosevelt joined the group, it quickly became the place for a mix of troops ranging from ivy league athletes to glee-club singers to texas rangers and indians.

answer is b.

  it is always the best policy to have good communication and good relations between individuals and, specially, between leaders of the countries. for this purpose, among others, there is a common place, the united nations, where the representants can present his and learn about the other country's policies.